To all of those looking to make SLI work on BF:V, It looks like I've got it working.
3440x1440 with 2x 970gtx's and a few tweaks, both GPU's running on 90-100% and the result is 70-100 fps with (except TAA) everything on Ultra! What I did to make it work?1. Nvidia Driver version: 416.812. I actually downloaded a profile from the following link while googling for the solution: https://www.sliprofiles.com/2018/09/06/battlefield-v-sli-profile-fix/ and if I remember correctly I had to reassign bfV.exe and the bfVtrial.exe to this profile. Although I haven't compared this custom profile with the BF1 one; I assume it's the BF:V profile with the SLI properties of the BF:1 file overlapping it.3. Future Frame Rendering has to be turned ON. This basically turned GPU usage on both to 90-100%4. TAA Low; because most TAA won't work very well with SLI in the way it works. That gave me the fps boost of 50-60 to a minimum of 70-80.

To all of those looking to make SLI work on BF:V, It looks like I've got it working.
3440x1440 with 2x 970gtx's and a few tweaks, both GPU's running on 90-100% and the result is 70-100 fps with (except TAA) everything on Ultra! What I did to make it work?1. Nvidia Driver version: 416.812. I actually downloaded a profile from the following link while googling for the solution: https://www.sliprofiles.com/2018/09/06/battlefield-v-sli-profile-fix/ and if I remember correctly I had to reassign bfV.exe and the bfVtrial.exe to this profile. Although I haven't compared this custom profile with the BF1 one; I assume it's the BF:V profile with the SLI properties of the BF:1 file overlapping it.3. Future Frame Rendering has to be turned ON. This basically turned GPU usage on both to 90-100%4. TAA Low; because most TAA won't work very well with SLI in the way it works. That gave me the fps boost of 50-60 to a minimum of 70-80.

I also turned Vsync of simply because of a G-sync panel.

Hope this combination works for you lads too!

NO Luck

I really dont seem to have luck with SLI lately

Minds haring a screenshot of both settings menus so I could clone them and test from there please?

The GPU-z's both indicating different voltages/GPU Load shows they're firing up in the menu already.
Hopefully it works for you!

P.S. I do remember that Future Frame rendering took effect a couple of seconds after exiting the menu going back ingame, other than that I really don't know why else it works for me.
P.P.S. Turning all on High and TAA High works fine too for fps. Thus TAA isn't that much involved in SLI performance apparantly

Hmm, very strange indeed, have you tried switching between fullscreen and borderless modes, and also double checking your nvidia control panel settings to make sure sli is actually enabled and also that you're not forcing vsync via the ctrl panel.

Just to reiterate,

- If you're using driver 416.81, you'll need to use nvinspector to change the sli compatibility bits to either the bf1 profile or star wars battlefront 2. Also, in the Nvidia ctrl panel, the game will show it's running in single gpu mode, that's fine, the fact you changed the bits will override that anyway.

- If you're using driver 416.34, sli should work by default, without needing to mess with nvinspector. Just make sure you're running in dx11 and that the Nvidia ctrl panel profile for the game says it's running in "nvidia default: sli" and not "single gpu".

The GPU-z's both indicating different voltages/GPU Load shows they're firing up in the menu already.
Hopefully it works for you!

P.S. I do remember that Future Frame rendering took effect a couple of seconds after exiting the menu going back ingame, other than that I really don't know why else it works for me.
P.P.S. Turning all on High and TAA High works fine too for fps. Thus TAA isn't that much involved in SLI performance apparantly

Turning taa to high or low doesn't make a difference to fps because the temporal filter is being applied regardless, and that is what is giving issues with sli.

TAA has a 10 to 20% performance hit over FXAA when using sli, but Dice in their infinite wisdom has forced TAA on, giving no option to disable it...

Hello, thanks for your help armoredmarmite ,now it's working the sli ,i did uninstall the nvidia driver with DDU and then reinstall it back and it's working.

But now i see the video cards are working only 50 -60 % not 80 or 90 % and i get only 80-100 fps this is verry strange,from what know i need to have at least 100-130 fps.

reverb_za you need to set the Future Frame Randeding to On and the GPU restirction memory to OFF and Vsync to Off ,tray that and see if you can get more fps,butwith that rig you need to have at least 80-100 fps in 4k .

I think more importantly is where is DX12 multi gpu support? Dice hasn't had a multi gpu implementation for DX12 in any of it's titles. Can frosbite even support it? Is ray tracing compatible with multi gpu?